Hey NS,
Reliability in what regard? I've never had an issue with one, nor have I seen any fail. Now I need to clarify that a little, as I know there have been some problems with folks trying to modify them to work with 34's or 17L's but they just aren't designed for that. Those reliability issues you have read about, have they specified whether they were with a Gen 1 or a Gen 2 version of the KPOS? I'd like to read up a little on that as well, also good to be aware, but from my experience, haven't had a problem. They are in use with government agencies here in CAnada as well.